Puncture-sealing compound



l atented Sept. 16, 1924.

0830 S. STEVENS, OF VJAXAI-IACI-IIE, TEXAS, ASSIGNOR OF ONE-HALF TO I. BLANCHARD & SONS, OF PALESTINE, TEXAS.

PUNCTURE-SEALING COMPOUND.

No Drawing.

To all whom it may concern:

Be it known that I, Osno S. STEVENS, a citizen of the United States of America, residing at l/Vaxaha-chie, in the county of Ellis and State of Texas, have invented certain new and useful Improvements in Puncture-Sealing Compounds, of which the following is a specification.

This invention relates to a puncture sealing compound for pneumatic tubes, which compound is to be introduced into the tube and will operate to automatically plug any usual puncture in the tube without permitting the escape of any appreciable quantity of air.

The sealing compound of this invention is made up of the following materials in substantially the proportions named: That is to say eight ounces of powdered cork; five ounces of powdered mica; two ounces of powdered soap tree bark; two ounces of a mixture of Epsom salts and ordinary salt, with these. materials in equal proportion; and one gallon of distilled water.

In the compound described, the cork and mica serve as the sealing body of the compound, and act to plug the puncture opening under the pressure of the air within the tube, the mica also forming a lining within the tube about the puncture to assist in holding the sealing compound in place. The soap tree bark serves as a thickener in the compound, and particularly to prevent the other materials from settling or separating within the tube. This particular material is important as otherwise the other ingredients, without chemical affinity one for the other, would tend to separate or settle, and their effective use would be prevented. The 40 salt mixture serves as an anti-freeze and to Application filed October 9, 1922. Serial No. 593,419.

some extent as a preserver of the rubber material of the tube. Distilled water is used to eliminate any mineral in the mix-' ture.

The compound as a whole, after thorough mixing, is introduced into the tube in the usual manner, and will, in the event of puncture of the tube, instantly fill the opening and seal the puncture. v

While the proportions above named are those preferred as for a compound of this type with the most effective results, it is nevertheless to be understood that a slight variation in these proportions will in no wise interfere with the effectiveness of the compound to seal the puncture, though possibly a substantial variation in the proportions might tend to a somewhat slower puncture sealing action. This is particularly true in any substantial change of the proportions of the cork, mica, or soap tree bark;

Claims:

1. The herein described tube sealing compound, comprising powdered cork, powdered mica, soap tree bark, a mixture of Epsom salts and ordinary salt, anddistilled water. a i

2. The herein described tube sealing com pound, comprising the following ingredients in substantially the proportions named, eight ounces of powdered cork, five ounces of powdered mica, two ounces of soap tree bark, two ounces of a mixture of Epsom salts and salt, and one gallon of distilled water. a

In testimony whereof I afiix my signature. I

OSRO S. STEVENS. [1,. s.] 

